Retreading apparatus



W. H. HERIVISDORF.

RETREADING APPARATUS,

APPLlcMlN FILED FEB.5.1919.

Patented Oct. 14, i919.

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RETREADING APPARATUS.

APPLICATION 'FILED FEB. 5, i919.

wanted 0d. 14,1919.

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Specication of Letters ?atent.

Application filed February 5, 1919. Serial Ito. 275,173.

To all whom z't may concern Be it known that I, WALTER Il. HnRMs- Dour, a citizen of the United States, residing in the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Retreading Apparatus, of which the following is a specilication.

rIhis invention relates to improvements in retreading apparatus and refers incre particularlyi to an apparatus adapted for carrying outfile process described in the pending application #265,829. lInasmuch as'l a description of the process is fully set lforth in said co-pending application, it is not thought .vulcanizing oven in which necessary that any detail description of this need be inserted here. The object of the in-l vention is to provide an improved form of a plurality of tires may have new treads vulcanized to the old tire body in accordance with said process. Before the tire with its new tread is' placed in the oven, the old tire is cleaned and then the new tread, by means of certain solutions, secured around the tire body. The

' inner tube or bag is inserted in the tire body and inflated to a desired pressure. It is also understood that the tire is wound with suitable fabric and is thenready to be inserted in the oven.

In the drawings:

Figure 1 is a side elevation with parts shown .in dotted lines.

Fig. 2 is a similar front elevation.

Fig. 3 is a fragmentary view showing the manner of mounting the tire in the oven.

Fig. 4 is sectional view on line 4-4 of Fig. 3.

Fig. 5 is a perspective view of a spacing collar used in the assembling of the tires.

Referring to the drawings, l designates a i frame work on which is supported an oven 2 having a semi-cylindrical top 3 and provided at one end with doors 4 hinged as shown at 5 to the oven. The doors are locked by means of plunger bolts 6. In suitable "bearing members 7 and 8 vis mounted a hollow tubular shaft 9 which extends through I the bearings and through the oven and projects out the front end of the oven at 10. On the shaf 9 aremounted a plurality of-supportin spiders 1i which are lkeyed to rotate with te shaft. 'ilo this end, a key, rod 12 extends through the oven and is fixed to the patentes eee. ia, asie.

rim of the tire. By adjusting the stem 16 tires of various sizes can be mounted on the spider. rIhe spider members, when assembled, are spaced apart so as to allow some space between the tires by means of spacing collars 18 which collars are provided With a keyway 19 so as to slidably fiton key 12. 'Ihe oven is provided at either side with a side opening 20"closed by glass.`

In the oven is mounted a semi-circular baffle wall member 2l the object of this baille wall being to insure more even distribution of the heatthroughout the oven. The oven is heated by means of a pair of gas burners 22 and the gases escape through the stack 23. The arrangement however, is such that the gases do not come in direct contact with the tireso as to injure it.

Describing now the manner of rotating the tires while being vulcanized, to the shaft 9 is secured a sprocket 24C which sprocket is driven through means of chain 25 an sprocket 26. The sprocket 26 is mounted on stub shaft 27 carrying a worm gear 28. The worm gear 28 in-turn meshes with the worm 29 which in turn is connected to pulley 30;

The pulley 30 is driven from the motor 3l heatingthe oven and means for rotating the y shaft comprising motor and operativeconnecticns between the motor and shaft,

2. In a retreading apparatus, the coinbination with an oven of a shaft rotatably mounttion with an Oven of a drive shaft extending ed therein, spiders removably keyed to the therethrough, a plurality of spaced spider shaft, adjustable tire supports carried by the 10 members adapted to support the tires,l means spiders, means for heating the oven and 5 for heating the oven and means for rotating means for rotating the shaft.- the shaft.

' 8. In a retreading apparati-1s, the combinalll/'ALTER HERMSDORF. 

